"It is extremely difficult to make a reasonable estimate of the danger."

But now I think that 2030 is a reasonable estimate.

An average population of between 5,000 to 8,000 is a reasonable estimate.

An alternative is to obtain reasonable estimates from other similar studies in the literature.

A population of 1200 to, at most, 1500, seems a reasonable estimate.

It is not known if they were at full strength, but a reasonable estimate might be in the region of 42,000 men.

The court "needs only enough evidence to make a fair and reasonable estimate."

But pinning down hard numbers, or even reasonable estimates, was difficult.

"Use some judgment in coming up with a reasonable estimate for what it is worth," he said.

No one has any reasonable estimates for the size of China's black economy.